Move ZoomObserver, ZoomController and ZoomEventManager to components/.

extensions/browser/extension_zoom_request_client.cc

Index: extensions/browser/extension_zoom_request_client.cc
diff --git a/extensions/browser/extension_zoom_request_client.cc b/extensions/browser/extension_zoom_request_client.cc
new file mode 100644
index 0000000000000000000000000000000000000000..c954532317188f9ba804a5de36de4d33a584f3f0
--- /dev/null
+++ b/extensions/browser/extension_zoom_request_client.cc
@@ -0,0 +1,17 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "extensions/browser/extension_zoom_request_client.h"
+
+namespace extensions {
+
+ExtensionZoomRequestClient::ExtensionZoomRequestClient(
+    scoped_refptr<const Extension> extension)
+    : extension_(extension) {
+}
+
+ExtensionZoomRequestClient::~ExtensionZoomRequestClient() {
+}
+
+}  // namespace Extensions